题目
题型:不详难度:来源:
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150751-99157.gif)
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150751-53123.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-49170.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-76292.gif)
(Ⅱ)讨论函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-49170.gif)
答案
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-11346.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-68092.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150753-41413.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150753-61802.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150753-78875.gif)
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150751-53123.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-49170.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-76292.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150753-49912.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150753-22616.gif)
曲线
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-49170.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150754-87846.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150754-89689.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150754-12171.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-11346.gif)
(Ⅱ)令
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150754-74348.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150755-33026.gif)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150755-27618.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150755-12414.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150755-88192.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-68092.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150756-39586.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150756-88650.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150756-72233.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150756-76058.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150756-16724.gif)
在区间
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150757-68589.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150757-74900.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-68092.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150756-76058.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150757-68589.gif)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150757-51952.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150757-31345.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150753-41413.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150756-16724.gif)
在区间
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150753-61802.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150757-74900.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150752-68092.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150753-41413.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150753-61802.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150603-30512.gif)
(1)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150603-13441.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150604-55345.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150604-81008.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150604-40711.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150603-13441.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150604-28850.gif)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150604-40711.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150604-39482.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150605-79145.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150335-22976.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150335-44026.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150335-16862.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150335-16862.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150335-44026.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150335-22976.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150335-44026.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150335-93495.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150336-43945.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150335-44026.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150335-22976.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150335-44026.gif)
①
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150336-84063.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150336-33641.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150336-59854.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150336-26421.gif)
以上四个函数在
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150337-82993.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150337-65855.gif)
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150224-10809.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150224-82034.gif)
(1)用实数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150225-80780.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150225-60862.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150225-80780.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150225-13452.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150225-44151.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150225-15053.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150225-80780.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150226-66967.gif)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150226-76905.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150226-55890.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150226-84204.gif)
求证:必存在
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150227-49013.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150227-51151.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150309-64966.gif)
A
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150309-20470.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150309-94016.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018150304-98539.jpg)
A (-∞,)∪(,2) B (-∞,)∪(2,+∞)
C (-1,0)∪(1,3) D (-∞,0)∪(,2)
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